Motor

Abstract

Motors for fans are provided. The motor includes a stator and a rotor. The stator includes a plurality of magnetic poles. The rotor is coupled to the stator and includes a magnetic structure with a plurality of magnetic poles. Each magnetic pole has an interpolar portion. A uniform gap is formed between the stator and the magnetic structure.

1. A motor, comprising:
 a stator comprising a plurality of magnetic poles; 
 a rotor coupled to the stator and comprising a magnetic structure comprising a plurality of magnetic regions, wherein each magnetic region comprises an interpolar portion for easily starting the motor; and 
 a Hall sensor detecting the phase change of the magnetic poles, wherein the interpolar portion is located on a side of the magnetic structure corresponding to an induction surface opposite to the Hall sensor positioned on the other side of the magnetic structure, wherein a uniform gap is formed between the magnetic structure and the plurality of magnetic poles. 
 
   
   
     2. The motor as claimed in  claim 1 , wherein the magnetic region is counter magnetized with respect to the interpolar portion therein. 
   
   
     3. The motor as claimed in  claim 1 , wherein the interpolar portion is non-magnetizing or cavity portion. 
   
   
     4. The motor as claimed in  claim 1 , wherein the shape of the interpolar portion is shaped as rectangular, triangular, or circular. 
   
   
     5. The motor as claimed in  claim 1 , wherein the interpolar portion is located at outer corner of the magnetic structure. 
   
   
     6. The motor as claimed in  claim 1 , further comprising a winding, wherein the stator further comprises a plurality of stacked silicon steel plates with symmetrical magnetic poles, and the winding is wound on the magnetic poles of the stacked silicon steel plates. 
   
   
     7. The motor as claimed in  claim 1 , further comprising a winding base, wherein the stator further comprises an upper stator part and a lower stator part coupled with the upper stator part for allowing the winding base to be sandwiched therebetween. 
   
   
     8. The motor as claimed in  claim 7 , wherein the upper and lower stator parts are integrally formed by injection molding or pressing, and the magnetic poles are formed on the upper and lower stator parts. 
   
   
     9. The motor as claimed in  claim 1 , wherein the rotor further comprises a shell and a shaft and the magnetic structure is disposed in the shell. 
   
   
     10. The motor as claimed in  claim 1 , wherein the magnetic structure is a cylindrical magnet or magnetic ring. 
   
   
     11. A motor, comprising:
 a stator; 
 a rotor coupled to the stator and comprising a magnetic structure with a plurality of magnetic regions and a plurality of interpolar portions; and 
 a Hall sensor detecting the phase change of magnetic poles of the motor, wherein the interpolar portions and the Hall sensor are disposed on the opposite sides of the magnetic structure. 
 
   
   
     12. The motor as claimed in  claim 11 , wherein the magnetic regions and the interpolar portions are counter magnetized. 
   
   
     13. The motor as claimed in  claim 11 , wherein the interpolar portions are non-magnetizing or cavity portions. 
   
   
     14. The motor as claimed in  claim 11 , wherein the shape of the interpolar portions are rectangular, triangular, or circular. 
   
   
     15. The motor as claimed in  claim 11 , wherein the interpolar portions are located at outer corner of the magnetic structure. 
   
   
     16. The motor as claimed in  claim 11 , further comprising a winding, wherein the stator further comprises a plurality of stacked silicon steel plates with symmetrical magnetic poles, and the winding is wound on the magnetic poles of the stacked silicon steel plates. 
   
   
     17. The motor as claimed in  claim 11 , further comprising a winding base, wherein the stator further comprises an upper stator part and a lower stator part coupled to the upper stator part for enabling the winding base to be sandwiched therebetween. 
   
   
     18. The motor as claimed in  claim 17 , wherein the upper and lower stator parts are integrally formed by injection molding or pressing, and magnetic poles are formed on the upper and lower stator parts. 
   
   
     19. The motor as claimed in  claim 11 , wherein a uniform gap is formed between the stator and the magnetic structure.